diff --git a/src/3rdparty/jthread.hpp b/src/3rdparty/jthread.hpp
index b9ad2bca2c..3d66bcef94 100644
--- a/src/3rdparty/jthread.hpp
+++ b/src/3rdparty/jthread.hpp
@@ -15,7 +15,7 @@
 
 #include "stop_token.hpp"
 
-namespace std {
+namespace nonstd {
 
 //*****************************************
 //* class jthread
@@ -148,6 +148,6 @@ inline void jthread::swap(jthread& t) noexcept {
 }
 
 
-} // namespace std
+} // namespace nonstd
 
 #endif // JTHREAD_HPP
diff --git a/src/3rdparty/stop_token.hpp b/src/3rdparty/stop_token.hpp
index 4a7bcbbb88..e0a7c8ddeb 100644
--- a/src/3rdparty/stop_token.hpp
+++ b/src/3rdparty/stop_token.hpp
@@ -16,7 +16,7 @@
 #include <immintrin.h>
 #endif
 
-namespace std {
+namespace nonstd {
 inline void __spin_yield() noexcept {
     // TODO: Platform-specific code here
 #if defined(__x86_64__) || defined(_M_X64)
@@ -507,4 +507,4 @@ private:
 template<typename _Callback>
 stop_callback(stop_token, _Callback) -> stop_callback<_Callback>;
 
-} // namespace std
+} // namespace nonstd